Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> b11fe3fdcb0efab21f09c879aea027daecccd8b4fcc28fb4757dce8f4eb869ff:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

error: pre-condition failed: listing has already been purchased
   --> 4eb8a10cb9f87357.NFTStorefront:243:16